[PATCH v2 4/4] arm64: dts: qcom: lemans: Add PSCRR NVMEM recorder node

[Faruque Ansari]

Add a one-byte NVMEM cell node  in the SDAM to persist the power
state change reason across resets, and wire it to a pscrr-nvmem
recorder consumer node so the reason is recorded before
shutdown/reboot and read back on the next boot.

Signed-off-by: Faruque Ansari <faruque.ansari@xxxxxxxxxxxxxxxx>
---
 arch/arm64/boot/dts/qcom/lemans-pmics.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/lemans-pmics.dtsi b/arch/arm64/boot/dts/qcom/lemans-pmics.dtsi
index 500f715931aa..96db3f57969f 100644
--- a/arch/arm64/boot/dts/qcom/lemans-pmics.dtsi
+++ b/arch/arm64/boot/dts/qcom/lemans-pmics.dtsi
@@ -97,6 +97,12 @@ reboot-mode {
 		mode-recovery = <0x01>;
 		mode-bootloader = <0x02>;
 	};
+
+	reboot-reason {
+		compatible = "pscrr-nvmem";
+		nvmem-cells = <&reboot_reason_persist>;
+		nvmem-cell-names = "pscr";
+	};
 };
 
 &spmi_bus {
@@ -186,6 +192,16 @@ reboot_reason: reboot-reason@48 {
 				reg = <0x48 0x1>;
 				bits = <1 7>;
 			};
+
+			nvmem-layout {
+				compatible = "fixed-layout";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				reboot_reason_persist: reboot-reason-persist@49 {
+					reg = <0x49 0x1>;
+				};
+			};
 		};
 	};
 

-- 
2.34.1